I had all kinds of problems from about mid-cruise onward when I went on my first cruise. Every time I stepped off the ship, the ground was moving. It was about a week after I got home before the sensation finally left me. Good thing it was just a weird "dizzy" feeling and not nausea to go with.

They tell me it doesn't happen with every cruise, so I have high hopes for the next one. 37 days and counting.